300 H&H Magnum Ammo

With slightly better ballistic performance than the .30-06, the .300 H&H Magnum was introduced in 1925 and is suitable for hunting virtually all large African game. The .300 H&H Mag. is commonly found in the fine double rifles of its inventor, Holland and Holland.

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History of .300 H&H Magnum Ammunition

The .300 H&H Magnum was introduced in 1925 by the British company, Holland and Holland. Initially introduced as the “Super-Thirty” and was intended to be used on the African plains. The .300 H&H Magnum is suitable for all except the largest of African game. The .300 H&H Magnum has also proven effective for elk, moose and other large North American game. Not only popular among hunters, the .300 H&H Magnum has also been used in target competition with its’ first major victory being at the Wimbledon Cup in 1935 with Ben Comfort as the shooter. This gave the cartridge great exposure to target shooters and hunters alike. In 1937, Winchester introduced the Model 70 chambered for the .300 H&H Magnum, it cemented the cartridge as a world leader in high performance, magnum cartridges for many years to come.

The cartridge can be had with bullet weights commonly ranging from 150 grains up to 220 grains. The .300 H&H Magnum can generate over 3,700 foot pounds of energy at the muzzle with velocities in excess of 3,300 feet per second. The case is based on the most popular of Holland and Holland cartridges, the .375 H&H Magnum. The case of the .375 was necked down to take a .309 inch bullet. It has a belted case with a narrow sloping shoulder.  This narrow shoulder is not commonly seen, but the .300 H&H Magnum has been proven ballistically superior to the .30-06.  This made the hunting public take notice. One of the areas where the .300 H&H Magnum makes great use of its’ high speed and weighty bullet, as well as the high ballistic coefficient, is at distances beyond 200 yards. Even out to 400 yards the .300 H&H will have about 2000 foot pounds of energy.

With the introduction of the .300 Winchester Magnum in the1960”s, the .300 H&H Magnum saw a decline in popularity, with some in the gun culture speculating that only the fine double barreled rifles that were made by H&H and other makers of fine rifles were what kept the cartridge alive. In the past few years, the cartridge has seen a resurgence in popularity, due manufacturers using bullets on the cutting edge of ballistic technology. Federal uses Nosler Partition and Barnes Triple-Shock in their .300 H&H Magnum offerings.

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